xor

(redirected from XORs)
Also found in: Dictionary.

XOR

[eks′ȯr]
(computer science)

xor

XOR

(eXclusive OR) A Boolean logic operation that is widely used in cryptography as well as in generating parity bits for error checking and fault tolerance. XOR compares two input bits and generates one output bit. The logic is simple. If the bits are the same, the result is 0. If the bits are different, the result is 1.

Several Symbols
Various symbols are used to designate the XOR operation including a + sign inside a circle, an underlined "V" and the caret (^). See cryptography, RAID and or.


XOR in Cryptography
This example uses XOR and the same "secret key" to encrypt and decrypt. Although XOR logic may be used, secret key algorithms are much more sophisticated than this. See encryption algorithm.
References in periodicals archive ?
In this scheme, to exchange new group key securely, we are using hash values and XOR operations instead of encryption, thus reducing communication overhead.
And they did not provide an optimal policy in the relay node to improve XOR performance in unsaturated wireless networks.
Delay analysis under dynamic traffic in DCF without XOR and with XOR
1 shows the delay comparison between DCF without XOR (the general forwarding scheme) and DCF with XOR.
In contrast, ii) DCF with XOR shows the end-to-end delays of the packets from source nodes 1 and 3 to destination nodes 3 and 1 via broadcast transmission of the coded packet in intermediate node 2: [D.
Based on this motivation about the relationship between the delay and the packet arrival rate in a network coding-capable wireless network, we propose two strategies, iXOR using the heuristic Holding-[chi], and oXOR with the optimal holding [chi] value, to get more XOR chances, even in the unsaturated network scenario based on IEEE 802.
Finally, we can get the total waiting time of DCF with XOR in Eq.
To compare DCF without XOR and DCF with XOR, we in detail explain the case studies of DCF without XOR.
iXOR opportunistically exchanges the function from XOR to DCF, or conversely, according to packet arrival rate [lambda].
OpNC method is the same as COPE, but it chooses a code with maximum number of packets for XOR and uses other metric for selecting the best code among all possible combinations of network code which can be decodes in each packet destinations.
In XOR based WNC, each neighboring node recovers its packet using pre-knowledge on the received XORed packet.
Like to [1], we used the pseudo-broadcasting mechanism: packets are XORed in a single unicast packet, an XOR header is added for all nodes that should receive that packet, and the MAC address is set to the address of one of the receivers.